Photoluminescence properties of dysprosium doped novel apatite-type Ba2Y3(SiO4)3F white-emitting phosphor

A series of novel single-phased apatite-type white-light-emitting Ba2Y3(SiO4)(3)F: xDy(3+) (x=0.005, 0.007, 0.01, 0.02, 0.03, 0.05, and 0.08) phosphors were prepared via a facile solid-state reaction. X-ray diffraction patterns of these phosphors revealed that all the samples have a single-phase fluorosilicate apatite with hexagonal structure. The Ba2Y3(SiO4)(3)F:Dy3+ phosphor can absorb in the UV-vis spectral region of 300-480nm and presented a white light emission, including three peaks at 478, 573, and 663nm, attributed to the (F9/2H15/2F9/2H13/2)-F-4-H-6-F-4-H-6, and (F9/2H11/2)-F-4-H-6 transitions of Dy3+ ions, respectively. The optimized doping concentration of Ba2Y3(SiO4)(3)F: xDy(3+) ions was 2%. The Ba2Y3(SiO4)(3)F: 0.02Dy(3+) with excellent thermal stability could maintain the emission intensity about 87% at 150 degrees C of that at room temperature. The chromatic properties of Ba2Y3(SiO4)(3)F: xDy(3+) were been found into the white light region. The experimental results reveal that the synthesized phosphor has potential applications in white LEDs.